Season 2+ players don't have to wait the three days. At that point, just click It's Been Three Days, Let's Roll, regardless of how long it has been.

You can go to the Reaper Menu (you can find it on the Main Menu) and name your Reaper Sword, if you have not done so already. You get the Jutsu Soul Reaper Style: <insert call>, <insert name>, a jutsu that costs 0 chakra, and converts two of your levels into automatic successes. You will also be able to use Reaper Blood - Shikai now, which you can activate for 20 stamina from the reaper menu. Shikai gives +2 strength, but removes 2 levels. Don't have a suitable name in mind? Random zanpakuto generator